Buffer mechanism for machine guns



NOV. 17, 1925- w. T. GRTON Burma uzcrmmsu ron lucarne @uns rusa .my n. 1924 l Walter T'. Bntn 'Patented Nov.Y l17,'vl925.

`*Orf-121mUlirlrw' STATLESQARMY x I Y zinafter eiid pointedout inthe del ing apartof lthis specication.

A practical; embod'inent rof fin Wh'ieh',`i" U jre'eoiliiig portions'Aiiizeontaiotwith the bliffer plug; l' .s fr "ii i FigifQ iste'ffrontlelevation-L of "theif-fback P1ate;,j-1 Y `f Fig.v

Fig. '4 is a' detailedv View eictension 14 engages the bottom plate l'lfto u'solitared andrforniedvithfn apertur'e ilff Y termediatefits toparid bottomforcommuni- 85 3 is a plitri View of the fback `Vin side eley'tion y ,60K

The butter plug25 is a cylindrical member provided with opposite notchesto formxforivardly inclined surfaces 26 and Wings 27" formed With squared ends .28 .and rear-v wardly inclined edges 29, Which merge with the notch surfaces 26 at right angles. The opposite Wings and notches are spaced by converging guides A30 `formed aXially of the plug 2F.

The buiier'cams 24 are adapted to be carried on either side of the'plug 25 andl for the sake of clarity only one will be described. .The buffer cam is a cylindrical member havin@- an inclined surface 3l and a slot 32, W'hicliV has a sliding fit on the Wing 27 of the plug, to form an inclined 'surface 33atright angles to 4the -inclined surface 3l and parallel to the inclined edge 29 of the Wing 27.

The buffer plug is assembled to the buifer cam by positioning its Wing 27 in the slot 32 of the cam until the fbase'of the cam rests upon the converging guides 30, .at Which time, the notch surfaces `26 and 3l may be slightly spaced.

B' resting the base of the buffer cam on the guides 30, I avoid a'tilting movement of the cam due to the thrust Yon initiating the shock absorbing mechanism. This-construction permits the cam to be formed With a relatively shallowT depthto provide greater space kfor the `reception of the resilient discs 23.

The converging guides 27 are disposed'at right angles to ythe axisof'the bufter'portion 19, so that the 'plug `may be free to move inwardly upon impact of the bolt Without `interfering `With the Walls of the buffer portion I19.

If itis desired to increase or decrease 'thenumber of discs -23, an equal or VLunequal number may be addedor removed and the adjusting screws 22 moved accordingly.

VWhile in the foregoing there has been illustrated and vdescribedsuch combination and arrangement fof elements, as constitute the' preferred embodiment of :my invention, 'it is nevertheless `desired to 'emphasize the 'fact that interpretation vof :the invention fshoul'd Aonly be 'conclusive when .made in the light vof the subjoined claims.

Iclaim:

f l. A buifermechanism embodying aplug,

said plug f ormed With opposite notches and opposite Wings Which are spaced by converging guides, and a plurality of buffer camseach of Which is formed With an inclined surface and a slotconverging With said surface at right angles thereto.

2. A buffer mechanism embodying a plug, said,plug formed Withopposite.notches and opposite wings converging Withfthe notches at right angles thereto, and a plurality of buffer cams each of which is formed with an inclined 'surface and a slot converging Withsaid surfaceiat right angles thereto.

3. A bu'er mechanism embodying a plug, said plug .formed with a notch and a Wing conv-erging with the notch at right angles thereto, a buffer cam, said cam formed with an inclined surface and a slot converging with 'said surface'at right angles thereto.

4. A buffer mechanism for machine `guns embodying'a back plate, resilient members carried in opposite rportions of the back plate, bu'er cams interposedV between the opposite groups of resilient members, each of said cams formed `With converging inclined surfaces, a bufer plug engageable by the cams and formed with complementary inclined surfaces, and means vfor confining `the resilient members lon opposite sides of thecams.

U5. lA buffenmechanism :for machine guns embodying-'a back plate, said plate formed with a cylindrical aperture extending from top to bottom, opposit'egroups of cushioning members carried by the plate, buffer cams interposed between said groups of cushioning members, a buffer plug o erative- .ly engaging said camsand means or variablyconfining .an equal or unequal quantity of cushioning .members on opposite sides -of fthe cams.'

- 6. A rbuffer.in'eeh-anism yfor machine guns embody-ing aback plate, said plate formed with Vvan apertura-opposite groups of 'cush- `ioning members carried bythe plate, `bufer cams interposed between said groups of cushioning members,`and a buffer plug interlposed between the `buffer cams and extending/through the aperture in the back plate.

7. A shock absorbing mechanism, embodying a housing, resilient memberscarried in opposite portions `of the housing, means interposed between -theiresilient members `for compressing the same, and means for variabl-.y confining an equalor unequal quantity of resilient members on either side'of the `compressing means. Y

8. Ashock absorblng mechanismembodv- 9. .A shock .absorbing mechanism, em-

, v bodying a buffer plug and buffein cams en- 1 gaging oppositesides of said'plug and free fi to be moved in opposite directions.v c v c 10'. Affshock absorbing v'mechanism em ,y bodying a buer plug andA a buiier'cam, n said-plug andvcam having dual interengaging inclined surfaces, the inclined vsurfaces ,g cf each member beingat right angles.'k

l "11. shock absorbing mechanism em;

camsvformeol and assembled with. s

bodying 'a buer plug and a buffer canil `10 Y slidably associated and interjlecked there# 12 A 'Shock 'lOSOI'lOIlgcmechanismr emi' b odying a bu'er plug and buli'er'fcams at. rlght angles to said plug, saidplug `and rotation of each other.

15 `f to'rplrevent axial *I 

